I was surprised to find this being unpolished visually. Like, very much so, the core art style is okay enough (a lot like that old XIII game but the environments have far more breakable stuff when the bullets start flying) but there are lod things like a car being white and when u get closer it switches to being green, those odd lines that look like, idk, some kind of defective AF so a few metres ahead you see a clear line moving alongside you slightly changing how stuff looks further ahead, more prominently on certain common materials. You might not notice a lot of that in the average mission, for example only the parking lot I'll mention more later had very distant views. But either way that's all visuals and presentation, the game itself seems polished enough.
So the core gameplay has you kicking doors down, clearing the room out of bad guys, taking any evidence or health/ammo/whatever you find and repeating for the next room which might be slightly larger or more complex (like 2 stories separated with a staircase or whatever). When all done with the mission you make your way to the exit and move on to the next one. One of the missions had a constant flow of reinforcements when finished so you had to get to the exit elevator and push the button to escape rather than just exit a fully cleared area casually so there are small variations like that I guess.
There's a quick mission mode to do the above and there's a wave mode taking place in a larger parking lot area with bad guys flowing in from various entrances. And then there's the core, meatier case mode where you have like, idk, a limited amount of time seemingly to work your way up through a series of missions starting from the training field and reaching up to whatever drug lord or something. Basically a bunch of connected quick missions that you unlock perks and weapons as you go through depending on your performance (I think you get to keep any unlocks for future plays and the other modes).
The gunplay is very F.E.A.R.ish and fun and you can sprint, crouch, have a basic melee attack and do a slide (which also works as an alternative to kicking doors down), that's about it, there's no advanced stuff like jumping or drop kicking fools with your melee button. It would have been nice to have things like tables and cars and other objects you can auto-slide over and a more satisfying melee attack. Although, who knows, maybe there's a perk for something cool. Obviously there's no stealth, your only way to enter an area is to destroy the door, haha. Oh yeah you have to heal manually as well so probably after you have cleared a room, it takes a few seconds, I only did it when checking out wave mode so far, the enemies dropped medikits to use occasionally, I think I had 4 at one point.
The enemies range from your basic melee weapon wielding thug to fools with pistols, shotguns, uzis, maybe some kind of armor to protect some of them from headshots. I imagine their equipment and lethality ramps up a lot as you change the difficulty or move through the case mode or later waves.
It's a nice if limited (well, you can call it focused instead) game and it's cheap and indie so yeah, one couldn't exactly expect the amount of stuff you get in PAYDAY2 or Black Ops 4 or something. It should be a blast in 2p co-op. Speaking of that it says if you time your door kicking with a friend you get instant bullet time. Bullet time activated at various times as I played but I have no idea what caused it, maybe a headshot, getting wounded, or it's just random.